Brake mechanism.



G. S. ACKLEY.

BRAKE MECHANISM. APPLICATION FILED IAN. I5. 1912.

1,158,764. l Patented Nov. 2, 1915.

' UNiTED fsTATEs PATENroFricE.

GRIFFIN S. ACKLEY, OF BUFFALO, NEW YORK, ASSIGNORTO G. S. ACKLEYY COMPANY.

BRAKE MECHANISM.

Specification of Letters Patent.

Patented Nov. 2, 1915.

Application led January 15, 1912. Serial No. 671,234.

To all whom t may concern: u Y

Bc it known that I, GRIFFIN S. AQKLEY, a citizen of the United States, residing at Buffalo, in the county of Erie and State of l brake mechanism in which `a hand actuatedv operating shaft is employed and the winding drum for the brake chain is arranged adjacentto this shaft above the floor of the car and is so constructed that the brake' chain may be wound thereon in either direction, but the invention is not necessarilylimited to brake mechanisms of this type.

One object of the invention is -toprovide the winding drum with an auxiliary chain which is secured thereto and engages the brake chain for limiting the releasing movement of the brake chain and the drum'. The auxiliary chain is adapted to be wound upon the drum as the latter. rotates to unwind the-brake chain and is adjustably connected to the brake chain, so that the extentto which the brake chain will unwind when the drum is released for releasing the brakes can be limited as desired. The auxiliary chain also serves to reinforce the portion of the brake chain adjacent to the drum, so

that if this portion of the brake chain should break or become .disconnected from the drum the auxiliary chain will secure the brake chain to the drumY and enable the brakes to be applied.

Further` objects of lthe invention are to provide simple and compact operative connections between, the hand operated armor wheel and the winding drum, which ,can be easily and firmly secured in position in the supporting frame or casing, and to provide the operating arm or wheel with a hinged handle which when not in use can be turned inwardly out of the Way, and, when desired, can Ibe readily turned outwardly to a position in which it can be easily grasped by the operator for turning the operating arm or wheel to apply the brakes.

In the accompanying` drawings: Figure 1 is a front elevation of a brake mechanism .embodying the invention. Fig. 2 is a secfragmentary sectional elevation in line 3-3,` Fig'. 2. Fig. 4 is a similar view showing the position of the parts whenthe drum v has been released.- Fig. 5 is a 'fragmentary sectional elevation on line 5--5, Fig. 1, on an enlarged scale. Fig. 6 is a similar sectional elevation ,showing a modified form of con struction. Fig.V 7 is. a fragmentary front elevation on an enlarged scale of the wheel showing the handle in its inturned position.

.Fig..8 is a sectional side elevation on line .8-8, Fig. 7 Fig. 9 is a similar fragmentary view showing the handle turned outwardly.

Like reference `characters refer to like .parts in the several figures.

The brake mechanism shown in the drawings is of the general type of that described and claimed in Letters Patent of the United States No. 1,002,531, issued to me Sept. 5, 1,911, in which a reversible winding drum is employed which is capable of winding'the brake chain in either direction and which is journaled inl a Asupporting' frame or casing, above the floor of the car adjacent to a winding shaft which is operated by a hand operated arm or wheel on the front of the casing. It will be understood, however, that the present invention is not limited tov a brake mechanism of this particular type, but is .applicable to other and diii'erent typesl and constructions ofbrake mechanisms.

In the construction, shown, A represents the frame or casing, B the reversible winding drum which is journaled therein, and C the brake chain which is attached by a pin c to lthat portion of the periphery of the drum which is of greatest radius, so as to wind thereon in either direction. The chain C passes downwardly from the drum through an opening in the floor of the car and over a vpulley D to a brake rod or other part which is connected to the brakes. The drum B is provided at one end with a ratchet E, engaged by a pawl e which normally prevents the drum from unwinding and is released by a foot lever e to permit the drum to unwind to releasethe brakes. At its opposite end the drum B has gear teeth f which mesh with the teeth of a pinion F which is operatively connected with a hand operated arm or wheel Gr for rotating the drum to apply the brakes. All of these parts may be of any usual or suitable construction.

l of the different links of the brake chain, so

I-I represents an auxiliary chain which is secured at one end to the winding drum B, preferably by the pin c which secures the brake chain C thereto, and at its opposite end is provided with a snap hook it or other connection which is adapted to detachablylThis unwinding movement of the `drum serves to wind the auxiliary chain H thereon, thus taking up the slack in this chain until it becomes taut and prevents further releasing movement` of the brake chain, as shown in Fig. 4;. The snap hook l1, which connects the end of the auxiliary chain to the brake chain, permits the end of the auxiliary chain to be easily secured-in any that the extent to which the brake chain can unwind .when the drum is released may be limited, as desired.v By attaching the auxiliary chain to the drum, rather than to a stationary part on the frame or casing, this chain serves not only to limit theyreleasing movement of the brake chain, but also limits the unwinding movement of the drum when released. This prevents the drum from rotating vto unwind the brake chain therefrom any more than is necessary to release the brakes, so that there will be no unnecessary amount of slack in the brake chain when unwound, and thus reduces-the amount of rotation of the drum which would otherwise be required for taking up slack in the brake chain when the brake is again applied, and enables the brakes to be more quicklyl and easily applied. The auxiliary chain fur-I ther reinforces the brake chain, so that if. thc z latter should break above' its point of at'- tachment to the auxiliary chain, it will not become disconnected from the winding drum nor drop down, but will be held by the auxiliary chain and the latter can then be wound u on the drum for drawing up the brake c ain and applying the brakes. When the auxiliary chain is used in a construction, such as the one shown in the drawings in which a horizontal winding drum is used, it supports the weight of the brake chain depending from the drum and thus prevents the further unwinding movement of the drum which the weight of the chain would otherwise produce and holds the brake chain sufliciently taut so that the brakes can be quickly applied. The use of the auxiliary chain, however, is not limited to this particular style of construction, but it can be used vto advantage, with winding drums of other constructions arranged in different positions.

The operative connections between the wall of the frame or'casing A. Adjacent to.

its end i, the shaft is provided with a square for. rectangular y portion 2 which is ladapted to fit in a correspondingly shaped opening in the pinion F, so that the pinion and shaft turn together.' At its opposite or forward end the lshaft I has a rounded journal por tion 3 upon which is journaled a bearing sleeve K which projects inwardly from the operating wheel G, and in the construction shown in Figs. 1, 2 and 5v is formed integrally with the wheel. thesleeve K is closed by a cap c rwhich forms an oil retaining chamber at A'-thej'front end of the shaft I.

In'the constructionvsshown in Figs-.1, 2 and 5, the sleeve K is provided at its rear end with ratchet teeth c and a clutch mem- Thefront end of ber L is mounted on-the square portion of y the shaft I having teeth Z which are adapted to engage the teeth la. The clutch member L is movable endwise of the shaft and is held in yielding engagement with the sleeve K by a coiled spring l which is inserted between the clutch member and the pinion F. The clutch permits the operating wheel to turn freely on the shaft I in one direction but locks the shaft and wheel, so that they rotate together when the wheel is turned in an opposite direction.

The sleeve K is journaled in an opening in the front Wall of the supporting frame o r casing and for this purpose a circular bearing bushing M is preferably `provided which is arranged in the opening between 'the sleeve and the casing and has an outwardly extending flange m which is adaptedv to engage the front face of thevsupporting frame or casing around the opening. The operating handle has an annular shoulder m which bears against the front end of the bearing bushingM and retains the latter in place in the casing, and the sleeve K in turn is held in place in the casing by a collar N which surrounds the inner end of the sleeve frame or casing and can be as easily removed therefrom, if desired. In 111g. 6, a modified form of connection is shown in which a detachablesleeve U is 'employed which is secured to the operating wheel G by a set screw o and is provided at vits ends with oppositely disposed ratchet teeth o ando2 and a clutch member P is winding drum upon .which'the'- brake chain can be wound in either direction. By reversing the clutch member P and the sleeve O, the mechanism can be easily changed, so

. that the operating wheel must be turned-in an opposite direction for applying the brakes. The brake'mechanism can thus be shifted from a right handed mechanism to a left handed mechanism or vice versa with little trouble. Y

In the construction shown, a hand wheel is provided for winding the drum to apply the brakes, but the operative connections above described between the wheel and the winding drum can be employed with equal facility in connection with anv other suitable construction of hand operated winding means.

To facilitate the -turning of the hand wheel or other operating arm for applying the brakes, a handle R is provided which is'secured thereto in such a Amanner that it can be turned to project outwardly there-.`

from in sition Where it can be readily grasped y the operator for turning the wheel to apply the brakes, and when not in use can be turned inwardly to a position where it will lie within the rim substantially in the plane of the wheel or operating arm and will be out ofthe way. In the construction shown, the handle R is hinged to the rim of the hand wheel in the following manner v Y The .wheel rim is provided on its inner face with spaced lugs or ears r' r between which the oase of the handle is inserted and to which it is pivoted by a pin r which extends through the base and is secured at its opposite ends in these lugs. The base of the handle lis provided with notches r2 and r3 and a spring dctent 1** mounted in the wheel rim is adapted to engage in these notches for holding the handle respectively in its outturned and inturned positions.l A

stop rs on the base is adapted to engage the inner edge of the wheel rim for limiting the inward movement of the handle. The handle will thus normally remain in either position to which it is turned, but can be easily `substantially as set forth.

moved from one position to the other when desired. This construction forms a simple means for hinging the handle to the Voperating wheel, but any other suitable connecting means may be employedwhich permit the handle to be moved ative position. I claim as my invention:

1. In a brake mechanism, the combination of a rotatable chain winding drum having a connection for the brake chain and corresponding peripheral winding portions which extend about said drum in opposite directions from said chain connection and which convergefrom said connection toward the axis of rotation ofthe drum, a brake chain attached to said chain connection, and an .auxiliary chain attached at one end tothe by checking the momentum of the drum and limiting the unwinding of the brake chain,

2. In a brake mechanism, the combination of a frame, a chain winding drum, a shaft which is yoperatively connected with said drum and is journaled at one end in said frame, an operating member arranged on into and out of its operthe opposite end of said-shaft, and means for connecting said Voperating member to said shaft so that they will turn together, said operating lmember being journaled in said frame and forming a -support for the end of said shaft, substantially'as set forth.

3. In a brake mechanism, the combination of a frame, a chain winding drum, a shaft which is operatively connected with said drum and 1s journaled at one end in said frame, an operating member journaled on the opposite end of said shaft, and a clutch member on said shaft adapted to engage said operating member for connecting the latter to said shaft, said operating member being journaled in said frame and forming a support for the 'end of said shaft, substantially as set forth.

4. In a brake mechanism, the combination of a frame, a chain winding drum, a shaft which is journaled at one end in said frame, an operating memberjournaled on the 0pposite end of said shaft, a pinion secured on said shaft intermediate Vof its ends and geared to 4said drum, a clutch member pinion and'said clutch member for holding 'the latter in yielding engagement with said operating member andv a journal bearing in said'frame'for said operating member, substantially as set forth.

5, In a brake mechanism, the combination of a rotatable winding drum, a brake chain attached thereto, an auxiliary chain attached at one end to said drum, and means for connectin the other end of said auxiliary chain to sai. brake chain at any portion thereof, said chains in the normal released position of the drum extending around said drum in opposite directions from their points of attachment whereby one chain is Wound on the drum when the other chain is unwound therefrom.

- 6. In a brake mechanism, the lcombination of a rotatable Winding drum, a brake chainv attached thereto, an auxiliary chain attached at one end to lsaid drum, and a connecting member `at the other end of said auxiliary chain and adapted to engage with any of,

Witness my hand this 11th day of J anuary,l 1912.

. GRIFFIN S. ACKLEY.

Witnesses: t J. C. RAYMOND, BERENIGE BREWER. 

